The 30-year-old has established himself as the favorite at next summer's Olympics after two landmark performances this year.

In April, he ran the fastest 26.2 miles in history: 2:03:02 in Boston. It didn't count as a world record because the course is considered too straight and too downhill.

The second- and third-place finishers Sunday also broke the old course record. Fellow Kenyan Emmanuel Mutai (no relation), the London Marathon champ, was 1:22 back. Tsegaye Kebede of Ethiopia was third.

Dado trailed London Marathon champ Mary Keitany by nearly 2½ minutes at the 15-mile mark but passed her with about a mile left. The 27-year-old Dado won in 2:23:15 -- almost a minute better than her previous personal best.

Fellow Ethiopian Buzunesh Deba, who lives in the Bronx, was second for her first podium finish at a major marathon, four seconds back. It was the second-closest women's finish in the race's history.

"I didn't really think we would catch her," Dado said through a translator in a post-race interview. "When we caught up to her, I was very surprised."

Keitany was third, 23 seconds back. The Kenyan was well under course-record pace for much of the race but faded badly over the final miles.